I just bought a Violet Goby from my LFS. They had it in a freshwater aquarium with other freshwater fish. I put it in my tank with 1 dojo loach, 1 rubber-lipped plecostomus, and 4 zebra danios.....my question is.....can the other fish stand a slightly brackish tank? I know that the Goby does better in Brackish water. Thanks in advance for the help.